Socket for electronic tubes with associated condensers



1949- w. J. LARKIN ET AL 2,458,390

, SOCKET FOR ELECTRONIC TUBES WITH ASSOCIATED CONDENSERS Filed Feb. 21, 1946 L I nveni ofas Wz/ZZZamJLarFc an, uflana 1568a co'n ,Deceased Patented Jan. 4, 1949 UNITED STATES PATENT OFFICE SOCKET FOR ELECTRONIC TUBES WITH ASSOCIATED CONDENSERS Application February 21, 1946, Serial No. 649,364

6 Claims.

This invention relates to sockets for electronic tubes and the object is to provide a construction wherein a condenser is incorporated with the socket for association with one of the electrical leads connected to the tube in such immediate adjacency to the tube as will insure its most efficient action. The construction is simple, readily made and neat in appearance. The condenser is protected and not subject to disarrangement in the assembly.

Our invention will be well understood by reference to the following description of the illustrative embodiment thereof shown by way of example in the accompanying drawings, wherein:

Fig. l is a plan view of the socket; and

Fig. 2 is a transverse section thereof on the central horizontal line, viewing Fig. 1, and is on a larger scale, the tube being shown in dotted lines.

In Fig. 2 of the drawings I have shown an electronic tube T of the so-called acorn type having the radially projecting contact prongs P, the tube being mounted in a socket l illustrative of the invention and consisting of a ring of suitable insulating material on the upper end face of which are mounted contact-making devices [2 which grip the prongs P and to which various leads from or to the tube may be secured as by soldering them to the extensions 14 from these devices. Herein, as best seen by reference to the device shown by the middle of Fig. 2, these devices comprise pairs of jaws resiliently closing somewhat in the manner of shear blades along lines perpendicular to radii of the ring and between which the prongs enter by a movement of partial rotation as from the left viewing the central portion of Fig. 2. The construction so far described is not new to the present application and its disclosure herein is by way of example.

The socket ring In is provided with a recess It, here shown (see Fig. 1) as of a bore of restricted cross section opposite one of the devices 12 and extending from the lower surface of the ring part-way through the same. A metallic fastening device extends from the interior of this bore through the upper wall of the same and serves to position the overlying contact device I 2. l-lerein a bolt-like member has a head l8 received in the bore and a threaded shank 20 extending through the wall and adapted to receive a nut 22 for securing the overlying contactmaking device l2. The bore l8, or at least the upper portion thereof, conveniently is hexagonal as shown in Fig. 1 to fit the similarly formed head and to hold it against rotation as nut 22 is set up.

The bolt head 18 is in the form of a cup having a downwardly presented recess. Housed within the bore is the condenser proper which herein takes the form of a cylinder 24 of suitable dielectric material, conveniently a ceramic cylinder, and having metallic inner and outer coverings 26 and 28 forming condenser plates.

The outer covering 28 may extend from the upper end of the ceramic cylinder and terminate short of the lower end while the inner covering 26 extends from the lower end upwardly and terminates short of the upper end of the cylinder. The cylinder with its associated plates seats in the downwardly facing cup in the head l8 and the outer plate 28 may be secured thereto by solder and is thus in conducting relation to the bolt head and to the contact l2 which is secured thereby. In the bottom of the bore [6 is received a metallic disc 30 which may be secured by solder in conducting relation to the inner plate 26 of the condenser. This disc provides at the exterior of the socket means for making an electric connection to said inner plate. To otherwise describe the construction, the condenser comprises the ceramic cylinder 24 and its plate-forming coatings 26 and 28 and the connecting disc 30 are suspended within the bore by the threaded stem 20 in immediate adjacency to the prong-engaging device l2 with which it is associated and the disc 30 is conveniently disposed at its mouth for electrical connection to some other element of the electrical assembly.

Herein this disc 30 is shown as having a projecting lug 32 which enters and is soldered to a horizontal annular flange 34 which includes also an upstanding, generally cylindrical flange 36 projecting upwardly within the ring of the socket l0 and encircling the lower portion of the tube T. The horizontal flange 34 may be secured to the lower face of the socket ring by additional means, as, for example, the screws 38 tapping into the same and conveniently having their heads countersunk as shown at the left of Fig. 2.

While we have herein described the condenser as connected to a shield, it will be understood that this application is exemplary merely and that connection from the disc 30 may be to any other suitable portion of the electric assembly as a whole as requirements may make desirable.

We are aware that the invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and we therefore desire the present embodiment to be considered in all respects as illustrative and not restrictive, as is in fact clear in several matters from the description itself. Reference is to be had to the appended claims to indicate those principles of the invention exemplified, by the particular embodiment described and which we desire to secure by Letters Patent.

What is claimed is:

1. A socket for an electronic tube comprising a base of insulating material having prong-engaging contacts, the base having an openendedrecess, inner and outer metallic members having a cross section no greater than the open end of the recess inserted therethrough tov be housed within said recess and receiving between thema dielectric member having condenser platesat opposite sides thereof in conducting relationto said members respectively, the member more remote from the open end or" the recess being electrically connected to one of the contacts and the member nearer the open end of the recess providing a connecting device.

2. A socket for an electronic tube comprising a base of insulating material, contacts exposed at one face thereof for engaging leads from the tube, the base having an open ended recess therein, a condenser having a cross section no greater than the open end of the recess inserted therethrough tobe housed within the recess, one plate of which has associated therewith a screw extending from the recess to said face and anchored to the contact, the screw suspending the condenser as a whole in the recess, the condenser having electrical connection means for its other plate eX- posed at the mouth of the recess.

3. A socket for an electronic tube comprising a base of insulating material within which base the tube may be received, the base having at its upper surface contacts for engaging radially extending leads from the tube, the base having a boreopening from its lower side and located opposite one of the contacts, an electrically conductive securing device-for saidcontact extending downwardly from the upper surface of the base axially into said bore, a condenser housed in said bore having one plate in conducting relation to said. device, and a connecting device exposed at the mouth of the bore to which the cooperating plate of the condenser is in conducting relation.

4. A socket for an electronic tube comprising a baseof insulating material within which base the tube may be received, the base havingat itsupper surface contacts for engaging radially extending leads from the tube, the base having a bore opening from its lower side and located opposite one of the contacts, a bolt and nut for securing the contact having a shank extending from the upper surface of the base through the upper wall of the bore and one of its elements non-rotatably fitting the, lateral wall thereof at its upper end and a condenser suspended from said element within the bore having one of its plates in conducting relation to said element, and a connecting device exposed at the mouth of the bore to which the cooperating plate of the condenser is in conducting relation.

5, A socket for an electronic tube comprising a base of insulating material within which base the tube may be received, the base having at its upper surface contacts for engaging radially extending leads from the tube, the base having a bore from its lower side defining a wall beneath one of said contacts, a fastener of the screw and nut type traversing the wall for securing the contact thereto and having a cup-shaped portion at the bottom of the recess, a condenser housed in the bore comprising a dielectric cylinder with inner and outer plate-forming layers, the condenser being inset in the cup with one plate in conducting relation thereto and a disc in the lower end of the bore opposing the lower end of the cylinder and in conducting relation to the other plate and providing at the exterior of the base means for making an electrical connection from said other plate.

6. A socket for an electronic tube comprising a base of insulating material Within which base the tube may be received, the base having at its upper surface contacts for engaging radially extending leads from the tube, the base having a here from its lower side defining a wall beneath one of said contacts, a fastener or" the screw and nut type traversin the wall for securing the con-- tact thereto and having a part received in the bottom of the bore, a condenser comprising a dielectric cylinder with inner and outer plateforming layers thereon, the condenser being housed in the bore and resting against said part with one plate in conducting relation thereto and a disc in the lower end of the bore opposing the lower end of the cylinder and in conducting relation to the other plate and providing at the exterior of the base means for making an electrical connection from said other plate.

W'lLLIAD/I J. LARKIN. ARDELL E. BACON, Executm'r of the Last Will and Testament of Dana H. Bacon, Deceased.

SE CITED The following references are of record in the file or" this patent:

UNITED STATES PATENTS Number Name Date 2,223,172 George Nov. 26, 1940 2,369,177 Raskhodofi Feb. 13, 1945 2,421,780 Frear June 10, 1947 FOREIGN PATENTS Number Country Date 548,097 1 Great Britain Sept. 24, 1942 

